Accumulated Other Comprehensive Loss - Composition of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	$ 90,349	$ 83,754	$ 91,891
Other comprehensive loss before reclassifications, net	(2,359)	314	(1,711)
Return of currency translation adjustment to parent		(2,443)	(1,773)
Reclassifications to income, net	56	64	59
Ending balances	97,421	90,349	83,754
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(11,302)	(11,680)	(8,766)
Return of currency translation adjustment to parent			(1,262)
Ending balances	(13,605)	(11,302)	(11,680)
Currency Translation and Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(10,407)	(10,729)	(8,018)
Other comprehensive loss before reclassifications, net	(2,161)	322	(1,140)
Return of currency translation adjustment to parent			(1,262)
Reclassifications to income, net	(93)	0	(309)
Ending balances	(12,661)	(10,407)	(10,729)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(895)	(951)	(748)
Other comprehensive loss before reclassifications, net	(198)	(8)	(571)
Return of currency translation adjustment to parent			0
Reclassifications to income, net	149	64	368
Ending balances	$ (944)	$ (895)	$ (951)